The hip semiendoprosthesis is an acceptable method to treat the proximal femoral fractures. Traditionally, the cemented version of the semiendoprosthesis has been used for this indication. However, the cementing carries a risk of fat embolism during the pressurization of the cement. The fat embolism can be avoided when using the non-cemented semiendoprosthesis. In this study we want to find out whether there are any differences in the treatment results between the cemented and non-cemented semiendoprostheses when treating the proximal femoral fractures.